EN 27842:1991
(Main)Automatic steam traps - Determination of discharge capacity - Test methods (ISO 7842:1988)
Automatic steam traps - Determination of discharge capacity - Test methods (ISO 7842:1988)
Migrated from Progress Sheet (TC Comment) (2000-07-10): The results of the PQ procedure has been sent to the BT members proposing to ++ submit the ISO standard to the formal vote.
Kondensatableiter - Bestimmung des Durchflusses - Prüfverfahren (ISO 7842:1988)
Purgeurs automatiques de vapeur d'eau - Détermination du débit - Méthodes d'essai (ISO 7842:1988)
La présente Norme internationale spécifie deux méthodes d'essai permettant de déterminer le débit des purgeurs automatiques de vapeur d'eau conformes à l'ISO 6552.
Avtomatični izločevalniki kondenzata - Ugotavljanje pretočnosti - Preskusne metode (ISO 7842:1988)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 27842:2000
01-september-2000
$YWRPDWLþQLL]ORþHYDOQLNLNRQGHQ]DWD8JRWDYOMDQMHSUHWRþQRVWL3UHVNXVQH
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Automatic steam traps - Determination of discharge capacity - Test methods (ISO
7842:1988)
Kondensatableiter - Bestimmung des Durchflusses - Prüfverfahren (ISO 7842:1988)
Purgeurs automatiques de vapeur d'eau - Détermination du débit - Méthodes d'essai
(ISO 7842:1988)
Ta slovenski standard je istoveten z: EN 27842:1991
ICS:
23.060.01 Ventili na splošno Valves in general
SIST EN 27842:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 27842:2000
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SIST EN 27842:2000
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SIST EN 27842:2000
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SIST EN 27842:2000
ISO
INTERNATIONAL STANDARD
7842
First edition
1988-12-01
INTERNATIONAL OiGANIZATION FOR STANDARDKATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXAYHAPOjJHAFl OPf-AHM3AuMR l-l0 CTAHJJAPTM3A~MM
Automatic steam traps - Determination of discharge
capacity - Test methods
Purgeurs automatiques de vapeur d’eau - Ddtermination du ddbit - M&hodes d’essai
Reference number
ISO 7842: 1988 (E)
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SIST EN 27842:2000
ISO 7842 : 1988 (EI
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 7842 was prepared by Technical Committee ISO/TC 153,
Valves.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0
@ International Organkation for Standardkation, 1988
Printed in Switzerland
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SIST EN 27842:2000
ISO 7842 : 1988 (E)
INTERNATIONAL STANDARD
Determination of discharge
Automatic steam traps -
capacity - Test methods
1 Scope and field of application ISO 6552, Automatic steam traps - Definition of technical
terms.
This International Standard specifies two test methods to
determine the discharge capacity of automatic steam traps to
3 Test arrangements
ISO 6552.
The test arrangements for condensate capacity determination
are shown in figures 1 and 2.
2 References
All piping and equipment shall be insulated to a value of
ISO 651, Solid-Stern calorimeter thermometers.
m2m°Ch
I S 0 652, Enclosed-scale calorime ter thermome ters.
R > 0,75 x 10-3-
J
ISO 653, Long solid-stern thermometers for precision use.
to reduce thermal losses to a minimuni.
ISO 654, Short solid-stern thermometers for precision use.
The instruments used for the measurements shall comply with
ISO 4185, Measurement of liquid flow in closed conduits - International Standards, if such Standards exist, e.g.
Weighing method.
- ISO 651, ISO 652, ISO 653 and ISO 654 for temperature
measurements;
I S 0 5167, Measuremen t of fluid flow b y means of orifke pla tes,
nozzles and Ven turi tubes inserted in circular Cross-section con-
- ISO 4185, ISO 5167 and ISO 5168 for flow measure-
duits running full. ments.
ISO 5168, Measurement of fluid flow - Estimation of uncer- The condensate removal device shall not be modified in any
tainty of a flow-rate measurement.
way from its commercial form.
1
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SIST EN 27842:2000
Arrangement A
Water
SUPPlY I
(
Steam vent
lLh+zq7 / ?’
u r
I
I
I
.
I
Steam water
1
c$-f~~
I
c Flash tank
accumulator
Valve 1
r indica:; :*,.,’
Calorimeter
--
--
-- bore ball valve
--
--e
Flow meter
P
4
qm2
Q
,
I -6 r-7 r r--
tT x r 0
Test device
0
-Ldo-lH-
Steam supply
0
11 -*lz*
0
t
0
4 (Note21
e (Note 3)
/ / - - .-
~~ Water-coo lled
/- /
Valve 3 /-
CO ndenser
0
f
0
Drain
/’
-
m c
--
-
NOTES
--
m2
C
1 The diameter of the pipework from the accumulator to t
...
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